This weeks images in the bing dynamic Windows 7 theme feature a herd of Lamas in Patagonia and Lake Mead in the USA

A herd of guanacos, Lama guanicoe, in front of Lago Sarmiento in southern Patagonia, Torres del Paine National Park, Chile

A herd of guanacos, Lama guanicoe, in front of Lago Sarmiento in southern Patagonia, Torres del Paine National Park, Chile

Aerial of Lake Mead and land erosion near the border of Arizona and Nevada./Nevada, United States, North America

Aerial of Lake Mead and land erosion near the border of Arizona and Nevada.

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Rob